Question 1

I took two 50mg tablets of diphenhydramine 17 hours before i had to take a pre-employment oral drug test. is there a chance i might fail the drug test?

Accepted Answer

This would not be screened or confused with illegal drugs. However people often get drowsy from this relatively high dose . If you were to fail the test, it would be based on your performance and not the drug itself.

Question 2

Can diphenhydramine hcl show up in an at home drug test?

Accepted Answer

It shouldn't show up in a home screening test.

Question 3

Is there a home drug test to test for diphenhydramine o.t.c. abuse?  i suspect my husband is abusing it

Accepted Answer

There's info here: https://en.wikipedia.org/wiki/Diphenhydramine
But, I'm concerned too about your relationship. Suspicion is often as harmful as the behavior in question. Consider Couple's Therapy after a few prep sessions for you alone to learn how to communicate concern w/o blame. A test would do nothing to help resolve any problem. Best wishes 2U2.

Question 4

I need allergys meds need a negative  drug test  my  allergies  are  killing  me can  i take  benadryl (diphenhydramine)  or  zrtek ?

Accepted Answer

benadryl (diphenhydramine) use is DANGEROUS if you intend to drive.
Zyrtec, Loratidine etc are safer choices. Best if taken at night time so that you awake without allergy symptoms

Question 5

I took drug test today and it was positive for tca, i regularly take an otc sleep aid with diphenhydramine. couldn't have caused the false positive?

Accepted Answer

did you mean THC (marijuana or cannabis)?  TCA medically usually means tricyclic antidepressant, and these are actually chemically similar to benadryl (diphenhydramine).  If all that was done was a SCREENING test, there are lots of potential false positives, and if used for legal purposes, all screening tests should be confirmed with a more sophisticated test, usually gas chromatography/mass spectroscopy.

Question 6

I took one tylonal pm the has 25mg of benadryl (diphenhydramine) in it. i have a pre employment drug test in 12 hrs whats the chance of a false positive for pcp.

Accepted Answer

Neither of these components is going to cause a positive PCP test.

Question 7

I took a urine drug testing for pre employment. about 12 hrs before i took two 50 mg of diphenhydramine sleep aid. is this possible to show up false positive?

Accepted Answer

Diphenhydramine can cause false positive for opiates and others, results will not confirm on GC/MS.

Question 8

Im on drug court and i want to take a sleep aid because i can't sleep i have a generic sleep aid but it has diphenhydramine hci in it will this make me test positive for anything or will it be ok to take it

Accepted Answer

The answer dr. Johnson provided is correct.  There are reports that with very high doses, Diphenhydramine has in rare cases, led to false positive drug screening for benzodiazapines.  However, if this were to occur, normally the sample would be retested using a more precise test and that would clear up the confusion.  It is reported that it could also trigger a false positive for pcp (but this is also very rare).
   Diphenhydramine is not a good choice for chronic problems with sleep. If you are in a program that requires drug testing, you might consider skipping the Diphenhydramine and working on sleep hygiene first.

Question 9

How to pass a drug test?

Accepted Answer

Avoid touching, sniffing, smelling, drinking, eating, or going anywhere near any trouble-making substances, for a couple of months before drug testing begins. That means staying far away from any friends or family who have any trouble-making substances.

Question 10

What is a non-dot drug test ?

Accepted Answer

Non-"Department of Transportation." http://m.afscme.org/members/ Simply policy differences: more/less stringent, w/ different cut-off levels & sources like urine, hair, blood, breath. Up to 14 drugs/metabolites: amphetamines, barbiturates, benzodiazepines, buprenorphine, cannabinoids, cocaine, ecstacy, marijuana, methadone,  methamphetamine, opiates, oxycodone, phencyclidine, propoxyphene, alcohol

Diphenhydramine drug test

I took two 50mg tablets of diphenhydramine 17 hours before i had to take a pre-employment oral drug test. is there a chance i might fail the drug test?

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Can diphenhydramine hcl show up in an at home drug test?

Is there a home drug test to test for diphenhydramine o.t.c. abuse? i suspect my husband is abusing it

I need allergys meds need a negative drug test my allergies are killing me can i take benadryl (diphenhydramine) or zrtek ?

I took drug test today and it was positive for tca, i regularly take an otc sleep aid with diphenhydramine. couldn't have caused the false positive?

I took one tylonal pm the has 25mg of benadryl (diphenhydramine) in it. i have a pre employment drug test in 12 hrs whats the chance of a false positive for pcp.

I took a urine drug testing for pre employment. about 12 hrs before i took two 50 mg of diphenhydramine sleep aid. is this possible to show up false positive?

Im on drug court and i want to take a sleep aid because i can't sleep i have a generic sleep aid but it has diphenhydramine hci in it will this make me test positive for anything or will it be ok to take it

How to pass a drug test?

What is a non-dot drug test ?

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